Low Cost 5A, 30V Power Amplifier
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Power Operational Amplifier FEATURES • LOW COST, ECONOMY MODEL — PA01 • HIGH OUTPUT CURRENT — Up to ±5A PEAK • EXCELLENT LINEARITY — PA01 • HIGH SUPPLY VOLTAGE — Up to ±30V • ISOLATED CASE — 300V • MOTOR, VALVE AND ACTUATOR CONTROL • MAGNETIC DEFLECTION CIRCUITS UP TO 4A • POWER TRANSDUCERS UP TO 20kHz • TEMPERATURE CONTROL UP TO 180W • PROGRAMMABLE POWER SUPPLIES UP TO 48V • AUDIO AMPLIFIERS UP TO 50W RMS DESCRIPTION The PA01 and PA73 are high voltage, high output current operational amplifiers designed to drive resistive, inductive and capacitive loads. For optimum linearity, the PA01 has a class A/B output stage. The PA73 has a simple class C output stage (see Note 1) to reduce cost for motor control and other applications where crossover distortion is not critical and to provide interchangeability with type 3573 amplifiers. The safe operating area (SOA) can be observed for all operating conditions by selection of user programmable current limit resistors. These amplifiers are internally compensated for all gain settings. For continuous operation under load, a heatsink of proper rating is recommended. This hybrid integrated circuit utilizes thick film (cermet) resistors, ceramic capacitors and semiconductor chips to maximize reliability, minimize size and give top performance. Ultrasonically bonded aluminum wires provide reliable interconnections at all operating temperatures. The 8-pin TO-3 package is hermetically sealed and electrically isolated. The use of compressible thermal washers and/or improper mounting torque will void the product warranty. Please see “General Operating Considerations” . Unidirectional Optical Speed Control The pulse output of a non-contact optical sensor drives a voltage-to-frequency converter which generates feedback for the op amp. With the loop closed in this manner, the op amp corrects for any variations in the speed due to changing load. Because of operation in only one direction, an unsymmetrical supply is used to maximize efficiency of both power op amp and power supply. High speed diodes at the input protect the op amp from commutator noise which may be generated by the motor. UNSYMMETRICAL SUPPLIES FOR EFFICIENCY NOTE 1: * Indicates not used in PA73. Open base of Q2A connected to output of A1. Copyright © Apex Microtechnology, Inc. 2012 (All Rights Reserved)

PA01 • PA73 ABSOLUTE MAXIMUM RATINGS SUPPLY VOLTAGE, +VS to –VS OUTPUT CURRENT, within SOA POWER DISSIPATION, internal INPUT VOLTAGE, differential INPUT VOLTAGE, common-mode TEMPERATURE, junction1 TEMPERATURE, pin solder -10s TEMPERATURE RANGE, storage OPERATING TEMPERATURE RANGE, case SPECIFICATIONS PARAMETER INPUT OFFSET VOLTAGE, initial OFFSET VOLTAGE, vs. temperature OFFSET VOLTAGE, vs. supply OFFSET VOLTAGE, vs. power BIAS CURRENT, initial BIAS CURRENT, vs. temperature BIAS CURRENT, vs. supply OFFSET CURRENT, initial OFFSET CURRENT, vs. temperature INPUT IMPEDANCE, common-mode INPUT...

POWER DERATING COMMON MODE REJECTION OUTPUT VOLTAGE, VO (V) HARMONIC DISTORTION INPUT NOISE COMMON MODE REJECTION, CMR (dB) POWER RESPONSE PHASE RESPONSE CURRENT LIMIT SMALL SIGNAL RESPONSE 120 OPEN LOOP GAIN, AOL (dB) 3.5 CURRENT LIMIT, ILIM (A) BIAS CURRENT INPUT NOISE VOLTAGE, VN (nV/ Hz) NORMALIZED BIAS CURRENT, IB (X) INTERNAL POWER DISSIPATION, P(W)

GENERAL Please read Application Note 1 "General Operating Considerations" which covers stability, supplies, heat sinking, mounting, current limit, SOA interpretation, and specification interpretation. Visit www.apexanalog.com for design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit and heat sink selection. The "Application Notes" and "Technical Seminar" sections contain a wealth of information on specific types of applications. Package outlines, heat sinks, mounting hardware and other accessories are located in the "Packages and...

NEED TECHNICAL HELP? CONTACT APEX SUPPORT! For all Apex Microtechnology product questions and inquiries, call toll free 800-546-2739 in North America. For inquiries via email, please contact apex.support@apexanalog.com. International customers can also request support by contacting their local Apex Microtechnology Sales Representative. To find the one nearest to you, go to www.apexanalog.com IMPORTANT NOTICE Apex Microtechnology, Inc. has made every effort to insure the accuracy of the content contained in this document. However, the information is subject to change without notice and is...